Flue-cleaner for boilers



0. DAHL.

' FLUE CLEANER FOR BOILERS.

APPLICATION FILED DEC. 13. 19!].

1 ,3 1 l ,439. Patented July 29, 1919.

Raf 4 INVENTOR BY Wf% A TORNEY ma copumsm PLANOGRAFH c0., WASHlNUTON. u c.

FFICE.

OTTO DAHL, 0F SEATTLE, WASHINGTON.

BLUE-CLEANER FOR BOILERS.

Specification of Letters Patent.

Patented July 29, 1919.

Application filed December 13, 1917. Serial No. 206,874.

To all whom it may concern:

Be it known that I, OTTO DATIL, citizen of the United States, residing at Seattle, in the county of King and State of Washington, have invented certain new and useful Improvements in Flue-Cleaners for Boilers, of which the following is a specification.

This invention relates to improvements in flue cleaners for boilers and has for its principal object to provide an improved and novel type of flue cleaners which is insertible within the fire tubes of the boiler; to provide a steam flue cleaner which is insertible from the front of the boiler and which blows the soot through the tubes from the back to the front; to provide a steam flue cleaner which has discharge openings arranged at varying distances or angles whereby all of the flues of the boilers within a pre-determined radius may be cleaned by simply revolving the cleaner. Still another object of my device is to provide a flue cleaner of the type described which is adaptable with use for double ended boilers. In cleaning fire tube boilers it is much preferable to discharge the soot from the front of the boilers or into the stack rather than to discharge it back into the fire box from which a large part of it again enters the tubes. My device is designed to overcome the above objection.

Other objects will appear as my invention is more fully explained in the following specification, illustrated in the accompanying drawings and pointed out in the appended claims.

In the drawings Figure 1 is a partial sectional view of a boiler showing my device in operative position. Fig. 2 is an enlarged view with parts broken away, of my improved cleaner. Fig. 3 is a further enlarged detail of a discharge plug as used in the cleaner.

Referring more particularly to the drawings numeral 1 indicates a fire tube boiler which is provided with longitudinal tubes 2 running through its entire length. My de vice is insertible through any one of the tubes 2 and includes a chambered sleeve 3 through which a pipe 4 is slidably mounted. The outer end of pipe 4 is plugged as at 5 and is provided with a series of discharge plugs 6 each of which has one or more holes 7 bored through it at such an angle that one end of the hole terminates within the pipe 4 while the other terminates without the pipe. The holes 7 are pointed backwardly so that when the end of the pipe 4 having the plugs therein is thrust through and beyond the boiler tubes the discharge from the holes 7 will come in contact with the ends of the other tubes in the boiler. Pipes 4 may be made in sections so that it may be assembled and thrust comparatively along boilers in a rather cramped space. That section of the pipes 4 which passes slidably through the sleeve 3 is provided with an intake port 8. A connection 9 supplies steam to' the chamber within sleeve 3 from which the steam enters pipe 4 through port 8 and flows through the holes 7 and into the inner ends of the tubes of the boiler. It will be noted that the pipes 4 have a long range of movement equivalent to the. length of the chamber within the sleeve 3 or in other words may be moved back and forth longitudinally through the sleeve just so long as the port remains within the chambered portion of the sleeve. very frequently steam holes are connected to the device so that the sleeve may move backwardly and forwardly along within pipe 4.. It will be understood that the pipe 4 is rotated by means of a hand wheel 10 in or-- der that all of the boiler tubes within the range of the various nozzles will be cleaned. As the steam in my device is blown directly through the tubes from the back of the boiler toward the front it will be apparent that the soot will be forced up the stack or collected in the breacher of the boiler.

While I have shown a particular form of embodiment of my invention, I am aware that many minor changes therein will readily suggest themselves to others skilled in the art without departing from the spirit and scope of the invention, and I therefore desire to avoid being limited to the exact form shown and described.

Having described my invention, what I claim as new and desire to protect by Letters Patent, is

1. In a device of the class described the combination of an internally chambered and normally stationary sleeve, a steam connection to the said chamber of the sleeve, a pipe arranged slidably and rotatably through the chamber of the said sleeve, a port through the said pipe in that portion of the pipe which is within the chamber of the sleeve, insertible discharge plugs screwed into and passing through the wall of said However, in practice pipe and arranged at varying distances from the inner end of the said pipe and in staggered relationship to each other, backwardl extending angular discharge openings in the said plugs the inner ends of said openings communicating With the inside of the pipe and'the outer ends communicating with the exterior of the pipe, whereby steam may be blown from the pipe backwardly and at an angle thereto. 7

' 2. In a device of the class described the combination of an internally chambered sleeve, a continuous and tubular pipe passing slidably through the said sleeve and making a tight joint Where it passes through the sleeve and an annular space between the pipe and chambered portion of the sleeve, a port in that portion of the pipe which is normally Within the sleeve, whereby steam tionsh-ip-to each other, the outer surfaces of the plugs being flush with the outer surfaces of the pipe, whereby the plugs will not interfere with the passage of the pipe through the boiler tube, a backWardly pointing discharge opening in each plug,the. inner end of the said opening communicating with the inside of the pipe and the outer end communicating witlithe exterior of the pipe, whereby steam escaping through the discharge opening will be projected backwardly and at an angle with the center line of the pipe.

In testimony whereof I alliX my signature.

OTTO DAHL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

